Sanyo DS25520, Service Manual

Page: 25 / 26

POWER ON: POWER OFF:
Q695-B
29.1 8.8
Q695-C GND
POWER ON: POWER OFF:
Q695-E
29.2 9.2
Q701-B 2.4
Q701-C 154.9
Q701-E 2.2
Q711-B 2.4
Q711-C 158.0
Q711-E 2.2
Q721-B 2.5
Q721-C 141.0
Q721-E 2.4
Q831-B 4.2
Q831-C 4.9
Q831-E 4.9
Q1071-B 2.9
Q1071-C GND
Q1071-E 2.4
MODEL DS25520 Chassis No. 25520-00
SCHEMATIC DIAGRAMS
CAPACITOR AND RESISTOR CODE CHART
CAPACITOR (Example)
500 C K 1500 B D ........................... ±0.5pF
T ............................ +50%
–
10%
J ............................ ±5%
K ........................... ±10%
M ........................... ±20%
N ........................... ±30%
Characteristics P ...........................
+100% –
0%
Value code Z ........................... +80%
–
20%
Tolerance code C ........................... ±0.25pF
Material code C ........................... Ceramic
Voltage rating E ........................... Electrolytic
F ........................... Polyester
N ........................... Polypropylene
T ............................ Tantalum
K ........................... Ceramic
H ........................... MT-Composite
P ........................... NP. Electrolytic
M ........................... MT-Polypropylene
RESISTOR (Example)
6 Y K 4.7 D ........................... ±0.5%
F ........................... ±1%
G ........................... ±2%
J ............................ ±5%
Value code K ........................... ±10%
Tolerance code M ........................... ±20%
Material code F ............................ Fusible
Wattage rating N ........................... Metalized Carbon
S ........................... Oxide Metalized
Y ........................... Wire Wound
C ........................... Solid
D ........................... Carbon Film
W .......................... Wire Wound
— 25 — — 26 — — 28 — — 27 —
FOR CONTINUED PROTECTION AGAINST
A RISK OF FIRE, REPLACE ONLY WITH
THE SAME TYPE 4A, 125V FUSE.
ATTENTION: POUR MAINTENIR LA PROTECTION
CONTRE LES RISQUES D' INCENDIE UTILISER UN
FUSIBLE DE RECHANGE DE MEME TYPE 4A, 125V.
CAUTION
4A 125V
BLOCK DIAGRAM
17
42
41
40
39
25
29
3
27
OSD (R)
OSD (G)
OSD (B)
OSD (BLK)
RESET
AFT S-CURVE
POWER FAIL
POWER
ON/OFF
STANDBY MODE
5V
CONTROL
Q693,
Q695
Q635
OVERLOAD
PROTECT.
D612
PHOTO
COUPLER
IC601
POWER
REG.
Q681
12V SW
DRIVE
IC681
5V REG.
RESET
D601-D604
FULL WAVE
RECTIFIER
Q613
ERR.
AMP.
Q611
Q612
OSC
Q601
SW.
T601
CONVERTER
TRANS.
LF601
LINE
FILTER
PS601
POSISTOR
L901
DEGAUSING
COIL
AC120V
60Hz
F601
AC
FUSE
C601
D627
+130V
D624
TJ1
D625
4A 125V
+12V
Q627
12V SW.
Y CV IN
MUTE
S SW
S/COMP SW
AV1/AV2 SW
12
13
14
15
8
OSD
SW.
RGB
OUT
CONT
BRITE COLOR
DEMOD
SHARP
BPA
BLACK
STRETCH
DELAY
LINE
SYNC
SEP.
HORIZ.
DRIVER
VIDEO
DET.
FM
DET.
BUS
INTERFACE
IC101
SIGNAL PROCESS
SDA 9
SCL 10
78/79
11
Y 52
Y 54
49
H
V
BEAM
VOLTAGE
DETECT.
ABL-IN
RF AGC 77
ACL
X141
SAW
FILTER
A101
UHF/VHF TUNER
WITH PLL
& BAND SW
IF
AGC
IC802
EEPROM
6
7
A1901
RC PRE-AMP
SW1901-1906
CONTROL KEYS
RF AGC
BUS SCL
BUS SDA
IIC SCL
IIC SDA
RC IN
KEY IN
X IN
X OUT
28 38
34 35
32 4
33 5
31
10
9
19
20
30
2 1
IC801
CPU
WITH
CAPTION
DECODER
X 801
ANT
C809
C808
IC501
VERT.
OUTPUT
Q401
HORIZ.
DRIVE
T401
H-DRIVE
TRANS.
Q402
HORIZ.
OUTPUT
HOLD DOWN
DETECT.
30
40
17
18
19
HOLD DOWN
T402
HORIZ.
OUTPUT
TRANS.
H.V.
DEFLECTION
YOKE
L902
ABL
FOCUS
SCREEN
HEATER
V +B
LOW +B
AUDIO +B
+200V
VERT +B
6/7
9
5
3
8
4
1
V
H
5
H-PULSE
ABL
Q721
Q711
Q701
-R OUT
-G OUT
-B OUT
G
R
B
Q901
PIX TUBE
D483
+26V
(7V)
D429
D428
(13V)
R428
g7lam
ANODE LEAK
DETECT.
L164
X161
75
56
36 V-S
37 H-S
33
26
IC001
AUDIO
AMP.
7 L
6 R
2
1
SP901
LEFT
SPEAKER
D482
VIDEO
1
Q486
9V REG.
Q490
5V REG.
5V
ALWAYS
12V
9V
TJ5
35
H-S
V-S
5V
B6
D801
CAP
VIDEO
OUT
Q1071
BUFF.
VIDEO
SW.
Q831
RESET
D802
15V
Q001
POWER OFF
NOISE
CANCEL
D492
D481
RL601
RELAY
+12V
4
15
14
INT. VIDEO
EXT
. VIDEO
9/10
11
V2 13
V1 12
S-Y 1
V1/V2 2
S-C 3
INT-V 5
V
Y
C
H
H
L
L
H
L
4.5MHz
SOUND
TRAP
Q202
BUFFER Q135
BUFFER
39
38
4
3
LS OUT-R
LS OUT-L
TV OUT-R
TV OUT-L
37 36 13
IC3401
MTS DECODER
5
6
SDL
SCL
Y
C
S-SW
VIDEO IN-2
AUDIO IN-2 (L)
K1001
REAR
AV IN
(AV2)
AND
FIXED
AUDIO
OUT
VIDEO IN-2 (R)
FIXED
AUDIO OUT (L)
FIXED
AUDIO OUT (R)
VIDEO IN-1
AUDIO IN-1 (L)
K1011
FRONT
AV IN
(AV 1)
VIDEO IN-1 (R)
34 33
K1051
S-VIDEO IN
(AV 2)
AUDIO +B
Q005
AUDIO +B
SWITCH
3
SP902
RIGHT
SPEAKER
WAVEFORMS
Note: Voltages were measured with offset color-bar signal and controls adjusted for normal picture.
IC101-
17
(R-Output)
3.4V HORIZ
IC101-
18
(G-Output)
3.4V HORIZ
IC101-
19
(B-Output)
3.4V HORIZ
IC101-
52
(Video Input)
1.0V HORIZ
IC501- 5
(Vertical Output)
58 VERT
IC501- 1
(Inverting Input)
0.6V VERT
Q202-E (TP16)
(Internal Video)
1.0V HORIZ
Q401- B
(Horizontal Drive)
2.1V HORZ
Q402- B
(Horizontal Output)
21V HORZ
T402- 9
(Heater)
28V HORIZ
Q601- G
(Power Switching)
15V 50KHz
VOLTAGE CHARTS
NOTE: Voltages were measured using color-bar signal and the controls adjusted for normal picture.
SERVICE NOTES:
1. When replacing parts on circuit boards, clamp the lead wires to terminals before soldering.
2. When replacing high wattage resistors on circuit board, keep the resistor body 10 mm (3/8) from circuit board.
3. Keep wires away from high voltage and high temperature components.
PRODUCT SAFETY NOTICE
THE COMPONENTS DESIGNATED BY A STAR (
★
) ON THIS SCHEMATIC DIAGRAM DESIGNATE COMPONENTS
WHOSE VALUES ARE OF SPECIAL SIGNIFICANCE TO PRODUCT SAFETY. SHOULD ANY COMPONENT
DESIGNATED BY A STAR NEED TO BE REPLACED, USE ONLY THE PART DESIGNATED IN THE PARTS LIST. DO NOT
DEVIATE FROM THE RESISTANCE, WATTAGE AND VOLTAGE RATINGS SHOWN.
X-RADIATION WARNING NOTE
THIS TV CONTAINS CRITICAL PARTS TO PROTECT AGAINST X-RADIATION. NOMINAL 2ND ANODE VOLTAGE IS
29.0KV AT ZERO BEAM CURRENT AT 120 VOLTS AC LINE, AND MUST NOT EXCEED 30.0KV UNDER ANY
OPERATING CONDITION. SEE HIGH VOLTAGE CHECK ON PAGE 8.
1
1
1
1
TOP VIEW
SIDE VIEW
COUNT TERMINALS IN
ARROW DIRECTION
MARK
E
C
B
A K
A
K
A K
A
K
A
K
A
K
INFRARED EMITTING
A....ANODE
K....CATHODE
INTEGRATED CIRCUITS
TRANSISTORS
1
DIODES PHOTO COUPLERS
B ... BASE
C ... COLLECTOR
E ... EMITTER
E C
B
E C
B
E C
B
E C
B
E C
B
E
C
B
E C
B
E
C
B
3
2
1
3 2
1
GND
(2)
IN
(1)
OUT
(3)
1 1
TOP VIEW
1
CHIP TRANSISTORS
B
C
E
TOP VIEW
B ... BASE
C ... COLLECTOR
E ... EMITTER
CHIP RESISTORS
TOP VIEW
123
12 x 10 = 12K ohm
3
NOTES ON SCHEMATIC DIAGRAMS
1. All resistance values in ohms K=1,000 M=1,000,000.
2. Unless otherwise noted on schematic, all capacitor values less than 1 are expressed in µF (Micro Farad),
and the values more than 1 are in pF.
3. Unless otherwise noted on schematic, voltage reading taken with VOM from point indicated to chassis
ground. Voltage reading taken using color-bar signal VHF channel 5, all controls at normal. Line voltage at 120
volts. Some voltages may vary with signal strength.
4. Waveforms were taken with color-bar signal and controls adjusted for normal picture. Waveforms marked
with an
✽
may vary with signal strength.
5. The Symbol indicates a fusible resistor, which protects the circuit from possible short circuits.
Device/Pin # Volts/Mode
IC101-36 5.0
IC101-37 4.3
IC101-38 4.7
IC101-39 GND
IC101-40 0
IC101-41 GND
IC101-42 GND
IC101-43 GND
IC101-44 2.3
IC101-45 3.6
IC101-46 2.1
IC101-47 3.1
IC101-48 GND
IC101-49 2.5
IC101-50 GND
IC101-51 GND
IC101-52 2.6
IC101-53 5.1
IC101-54 2.9
IC101-55 2.6
IC101-56 2.5
IC101-57 GND
IC101-58 3.6
IC101-59 4.4
IC101-60 4.4
IC101-61 GND
IC101-62 GND
IC101-63 GND
IC101-64 GND
IC101-65 2.4
IC101-66 2.2
IC101-67 2.2
IC101-68 0
IC101-69 3.2
IC101-70 GND
IC101-71 GND
IC101-72 GND
IC101-73 2.3
IC101-74 GND
IC101-75 2.2
IC101-76 2.6
IC101-77 2.2
IC101-78 2.9
IC101-79 2.9
IC101-80 GND
IC501-1 2.5
IC501-2 25.9
IC501-3 2.9
IC501-4 GND
IC501-5 11.5
IC501-6 26.5
IC501-7 2.6
IC601-1 130.0
IC601-2 29.2
IC601-3 GND
IC681-1 13.4
IC681-2 GND
IC681-3 5.0
IC801-1 4.0
IC801-2 3.9
IC801-3 4.9
IC801-4 0
IC801-5 0
IC801-6 0.3
IC801-7 0
IC801-8 0
IC801-9 0
IC801-10 4.9
IC801-11 GND
IC801-12 4.8
IC801-13 GND
IC801-14 4.9
IC801-15 1.9
IC801-16 0.2
IC801-17 2.1
IC801-18 GND
IC801-19 2.2
IC801-20 2.0
IC801-21 GND
IC801-22 4.9
IC801-23 GND
IC801-24 GND
IC801-25 4.8
IC801-26 0.3
POWER ON: POWER OFF:
IC801-27
4.9 0
IC801-28 3.9
IC801-29 2.6
IC801-30 0
IC801-31 4.9
IC801-32 3.6
IC801-33 4.9
IC801-34 3.7
IC801-35 4.8
IC801-36 4.9
Device/Pin # Volts/Mode
POWER ON: POWER OFF:
D612-1
30.6 10.5
POWER ON: POWER OFF:
D612-2
29.5 9.4
POWER ON: POWER OFF:
D612-3
0.7 0.4
POWER ON: POWER OFF:
D612-4
14.7 1.7
IC001-1 6.7
IC001-2 15.4
IC001-3 N.C.
IC001-4 GND
IC001-5 N.C.
IC001-6 N.C.
IC001-7 1.4
IC001-8 GND
IC101-1 GND
IC101-2 GND
IC101-3 GND
IC101-4 GND
IC101-5 GND
IC101-6 5.1
IC101-7 2.1
IC101-8 2.7
IC101-9 3.8
IC101-10 3.6
IC101-11 4.3
IC101-12 1.5
IC101-13 1.5
IC101-14 1.4
IC101-15 0.2
IC101-16 8.2
IC101-17 2.5
IC101-18 2.2
IC101-19 2.4
IC101-20 GND
IC101-21 GND
IC101-22 GND
IC101-23 GND
IC101-24 GND
IC101-25 N.C.
IC101-26 2.1
IC101-27 2.6
IC101-28 5.3
IC101-29 2.7
IC101-30 0.4
IC101-31 GND
IC101-32 N.C.
IC101-33 1.0
IC101-34 1.8
IC101-35 N.C.
Device/Pin # Volts/Mode
Q486-B 9.9
Q486-C 11.6
Q486-E 9.2
Q490-B 5.9
Q490-C 6.7
Q490-E 5.2
POWER ON: POWER OFF:
Q601-G
0.1 0.4
POWER ON: POWER OFF:
Q601-D
15.1 164
POWER ON: POWER OFF:
Q601-S
5.6 0
POWER ON: POWER OFF:
Q611-B
4.6 0.8
POWER ON: POWER OFF:
Q611-C
14.4 1.7
POWER ON: POWER OFF:
Q611-E
5.6 0.4
POWER ON: POWER OFF:
Q612-B
4.6 0.8
Q612-C GND
POWER ON: POWER OFF:
Q612-E
5.6 0.4
POWER ON: POWER OFF:
Q613-B
0.2 0.1
POWER ON: POWER OFF:
Q613-C
4.7 0.1
Q613-E GND
POWER ON: POWER OFF:
Q627-B
12.7 8.0
POWER ON: POWER OFF:
Q627-C
13.2 0
POWER ON: POWER OFF:
Q627-E
13.3 8.0
POWER ON: POWER OFF:
Q635-B
4.0 1.3
POWER ON: POWER OFF:
Q635-C
29.2 9.0
POWER ON: POWER OFF:
Q635-E
4.0 1.3
POWER ON: POWER OFF:
Q681-B
0.7 0
POWER ON: POWER OFF:
Q681-C
0 8.1
Q681-E GND
POWER ON: POWER OFF:
Q693-B
0.5 6.5
POWER ON: POWER OFF:
Q693-C
29.1 8.4
POWER ON: POWER OFF:
Q693-E
0.4 6.0
IC801-37 4.9
IC801-38 4.8
IC801-39 0.2
IC801-40 0
IC801-41 0
IC801-42 0
IC802-1 GND
IC802-2 GND
IC802-3 GND
IC802-4 GND
IC802-5 4.9
IC802-6 4.9
IC802-7 GND
IC802-8 5.0
IC1081-1 2.5
IC1081-2 2.9
IC1081-3 2.5
IC1081-4 2,4
IC1081-5 2.4
IC1081-6 GND
IC1081-7 GND
IC1081-8 GND
IC1081-9 0
IC1081-10 0
IC1081-11 0
IC1081-12 2.9
IC1081-13 2.5
IC1081-14 2.9
IC1081-15 2.9
IC1081-16 9.3
IC3401-1 4.1
IC3401-2 4.1
IC3401-3 4.1
IC3401-4 4.1
IC3401-5 3.6
IC3401-6 3.7
IC3401-7 GND
IC3401-8 4.1
IC3401-9 4.1
IC3401-10 4.1
IC3401-11 4.1
IC3401-12 4.9
IC3401-13 4.1
IC3401-14 1.3
IC3401-15 1.3
IC3401-16 0
IC3401-17 GND
IC3401-18 3.2
IC3401-19 9.1
IC3401-20 0
IC3401-21 4.1
Device/Pin # Volts/Mode Device/Pin # Volts/Mode
IC3401-22 4.1
IC3401-23 3.7
IC3401-24 3.9
IC3401-25 4.1
IC3401-26 4.1
IC3401-27 4.1
IC3401-28 1.9
IC3401-29 4.1
IC3401-30 4.1
IC3401-31 2.0
IC3401-32 4.1
IC3401-33 4.1
IC3401-34 4.1
IC3401-35 0
IC3401-36 4.1
IC3401-37 4.1
IC3401-38 4.1
IC3401-39 4.1
IC3401-40 4.1
IC3401-41 4.1
IC3401-42 GND
IC3401-43 4.1
IC3401-44 4.1
IC3401-45 4.2
IC3401-46 GND
IC3401-47 4.1
IC3401-48 4.1
POWER ON: POWER OFF:
Q001-B
0.7 0
POWER ON: POWER OFF:
Q001-C
0 6.3
Q001-E GND
Q005-B 9.6
Q005-C 10.3
Q005-E 10.3
Q135-B 2.2
Q135-C 5.0
Q135-E 1.5
Q202-B 1.7
Q202-C GND
Q202-E 2.3
Q208-B 2.5
Q208-C GND
Q208-E 3.1
Q401-B 0.3
Q401-C 17.7
Q401-E GND
Q402-B 1.1
Q402-C N/A
Q402-E 1.1
Device/Pin # Volts/Mode
Device/Pin # Volts/Mode